2,542 research outputs found

    Local and global aspects of separating coordinates for the Klein-Gordon equation

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    summary:The author considers the Klein-Gordon equation for (1+1)(1+1)-dimensional flat spacetime. He is interested in those coordinate systems for which the equation is separable. These coordinate systems are explicitly known and generally do not cover the whole plane. The author constructs tensor fields which he can use to express the locus of points where the coordinates break down

    On a new set of orthogonal polynomials

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    summary:An orthogonal system of polynomials, arising from a second-order ordinary differential equation, is presented

    Point particle kinematics and light propagation in de Sitter spacetime

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    V této práci se zabýváme de Sitterovou speciální relativiou, která se odehrává v de Sitterově časoprostoru namísto Minkowského časoprostoru. Začínáme studií grupy symetrie de Sitterova časoprostoru. Snažíme se použít tyto poznatky k rozvinutí kinematiky v de Sitterově časoprostoru. Dále přezkoumáváme spojení mezi elektrodynamikou na pevně zvoleném časoprostoru a elektrodynamikou v makroskopickém médiu v plochém časoprostoru. Toto aplikujeme na de Sitterův časoprostor a hledáme index lomu sdruženého média

    Covariant Loop Quantum Gravity

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    In this thesis we offer a broad introduction into loop quantum gravity against the backdrop of the quantum gravity research as a whole. We focus on both the canonical and covariant version of the theory. In the latter version we investigate the dynamics of some simple configurations in the simplified setting of Ponzano-Regge model. We ascertain that the naïve approach to define a consistent dynamics, where the path integral's partition function is computed as a sum of amplitudes corresponding to all boundary and bulk states, fails in this case, on account of an appearance of divergences. This opens up space for the utilization of some more sophisticated methods

    Kovariantní smyčková gravitace

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    Tato práce nabízí široký úvod do teorie smyčkové kvantové gravitace na pozadí všech ostatních přístupů ke kvantování gravitace. Věnuje se jak kanonické, tak kovariantní verzi této teorie. Ve druhém ze zmíněných přístupů posléze zkoumá dynamiku spjatou s množinou vybraných jednoduchých konfigurací. K jejím zjištěním patří, že naivní přístup k definování konzistentní dynamiky, kdy je partiční funkce dráhového integrálu definována jako suma amplitud odpovídajících všem hraničním a vnitřním stavům, selhává, vzhledem k výskytu divergencí. Tento fakt otevírá prostor pro použití vice sofistikovaných přístupů.In this thesis we offer a broad introduction into loop quantum gravity against the backdrop of the quantum gravity research as a whole. We focus on both the canonical and covariant version of the theory. In the latter version we investigate the dynamics of some simple configurations in the simplified setting of Ponzano-Regge model. We ascertain that the naïve approach to define a consistent dynamics, where the path integral's partition function is computed as a sum of amplitudes corresponding to all boundary and bulk states, fails in this case, on account of an appearance of divergences. This opens up space for the utilization of some more sophisticated methods.Institute of Theoretical PhysicsÚstav teoretické fyzikyMatematicko-fyzikální fakultaFaculty of Mathematics and Physic

    Point particle kinematics and light propagation in de Sitter spacetime

    No full text
    V této práci se zabýváme de Sitterovou speciální relativiou, která se odehrává v de Sitterově časoprostoru namísto Minkowského časoprostoru. Začínáme studií grupy symetrie de Sitterova časoprostoru. Snažíme se použít tyto poznatky k rozvinutí kinematiky v de Sitterově časoprostoru. Dále přezkoumáváme spojení mezi elektrodynamikou na pevně zvoleném časoprostoru a elektrodynamikou v makroskopickém médiu v plochém časoprostoru. Toto aplikujeme na de Sitterův časoprostor a hledáme index lomu sdruženého média

    Franz Werfel Family Correspondence 1925-1947 Bulk dates: 1940-1944

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    This collection consists primarily of Werfel family correspondence from 1940-1947. Letters and telegraphs mainly document Franz and Alma Werfel's escape from France to the United States, and the efforts of Franz's sisters Marianne Rieser and Hanna Fuchs-Robettin to help their parents escape Europe by way of France and Portugal. Additional correspondence concerns Ferdinand Rieser's work at the Zurich Schaupielhaus, and the collection also contains a typescript of the Marianne Rieser play "Your Problem Please."Author Franz Werfel (1890-1945) was born in Prague to the glove merchant Rudolph Werfel. He had two sisters, playwright Marianne Amalie Rieser (1899-1965) and Hanna Fuchs-Robettin (1896-1964). Werfel was educated in Prague, and from 1915 to 1917 he served in the Austrian army on the Russian front. After the war he settled in Vienna and worked as a full-time writer. His novels were especially popular in England and in the United States. In Vienna he met Alma Mahler-Gropius (1879-1964), the widow of the composer Gustav Mahler. At that time she was married to the architect Walter Gropius. She divorced Gropius and went to live with Werfel; they were married in 1929. The Werfels lived in Austria until 1938, when the Anschluss forced them into exile. After travelling from France to Spain, they settled in the United States in 1940. Franz Werfel died in Beverly Hills, California, on August 26, 1945, in the middle of his work, correcting galley proof of his last book of verse.Alma Schindler was born in Vienna in 1879 as the daughter of the landscape painter Emil Jakob Schindler. She studied with the composer Alexander von Zemlinsky and in 1902 married Gustav Mahler. In 1915, she married the architect Walter Gropius; the couple separated in 1918. In 1929, she married Franz Werfel. She died in New York in 1964.On permanent loan from Judaica Conservancy FoundationProcesseddigitize

    Letter from Mrs. Franz Milche [et al.] to John Muir, 1908 Apr 15 .

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    Apr. 15, 1908Wallingford, ConnMy dear Mr. Muir -As the twenty-first of April is drawing near we are again reminded of our dear author and hope our congratulations for his health, happiness, and co[n?]sequent prosperity will in someway hurry the books along.The old man in the picture which had the honor to be placed upon your desk passed very peacefully away about a month ago. Dear old father, eighty-six years old, bright, happy and loved by all. There is no room for04137 real regret.With love and best wishes from all of us.Yours cordiallyMrs Franz MilckeFranz MilckeSelma MilckeWolfram MilckeApr 15 1908

    A psychoanalysis study in the main character representing franz kafka as the author in metamorphosis novella

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    Nurul Atikah, A Psychoanalysis Study In The Main Character Representing Franz Kafka As The Author In Metamorphosis Novella. Dibimbing oleh Herland Franley Manalu dan Diana Anggraeni. Penelitian ini menganalisa kondisi psikologis dari karakter utama yaitu Gregor samsa dalam metamorphosis yang ditulis oleh seorang eksistensialis yaitu Franz Kafka pada tahun 1912. Kondisi psikologis tersebut yang membentuk kepribadian karakter tersebut berupa kecemasan, kegalauan, dan kesedihan bisa sejalan dengan motivasi pengarang yang dilihat dari biography nya dan kondisi eksistensialis pengarang yang dituangkan didalam karya sastra ini. Di dalam cerita tersebut, penelitian ini menganalisa kepribadian karakter utama yaitu Gregor Samsa sebagai objek penelitian menggunakan teori kepribadian Id, Ego dan Superego dari Sigmund Freud kemudian mengaitkan relasi antara kepribadiaan karakter utama dengan pengalaman kehidupan Franz Kafka sebagai pengarang melalui psikologi sastra tentang psikologi pengarang. Penelitian ini menggunakan metode kualitatif analisis naratif yang merepresentasikan informasi dalam bentuk narasi dan dialog sebagai objek dari penelitian. Adapun isi dari analisis, sebagai berikut; (1) Kondisi kepribadian Gregor Samsa yang mengalami kegalauan, kecemasan, kesedihan dengan kehidupannya yang dipetakan melalui dialog dan monolog(2) Kepribadian Gregor Samsa yang dijelaskan dalam aliran karya sastra Kafka disebut sebagai Kafkaesque (3) Membuktikan pada kesimpulan melalui data yang telah dikumpulkan bahwa kondisipsikologis yang dialami oleh Gregor Samsa merupakan cerminan dari kehidupan Franz Kafka sebagai pengarang. Sebagai seorang pengarang, karya sastra Franz Kafka merepresentasikan konteks sosial pada era itu bahkan masih relevan sampai sekarang dalam tema-tema eksistensial seperti itu
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